//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package com.action.utils;

import java.net.URLDecoder;
import java.net.URLEncoder;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

public class Des {
    public Des() {
    }

    public static String decrypt(String message, String key) throws Exception {
        byte[] bytesrc = convertHexString(message);
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
        cipher.init(2, secretKey, iv);
        byte[] retByte = cipher.doFinal(bytesrc);
        return new String(retByte);
    }

    public static byte[] encrypt(String message, String key) throws Exception {
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
        cipher.init(1, secretKey, iv);
        return cipher.doFinal(message.getBytes("UTF-8"));
    }

    public static byte[] convertHexString(String ss) {
        byte[] digest = new byte[ss.length() / 2];

        for(int i = 0; i < digest.length; ++i) {
            String byteString = ss.substring(2 * i, 2 * i + 2);
            int byteValue = Integer.parseInt(byteString, 16);
            digest[i] = (byte)byteValue;
        }

        return digest;
    }

    public static String toHexString(byte[] b) {
        StringBuffer hexString = new StringBuffer();

        for(int i = 0; i < b.length; ++i) {
            String plainText = Integer.toHexString(255 & b[i]);
            if (plainText.length() < 2) {
                plainText = "0" + plainText;
            }

            hexString.append(plainText);
        }

        return hexString.toString();
    }

    public static void main(String[] args) throws Exception {
        String key = "redpass1";
        String value = "12345678901234567890";
        String jiami = URLEncoder.encode(value, "utf-8").toLowerCase();
        System.out.println("加密数据:" + jiami);
        String a = toHexString(encrypt(jiami, key)).toUpperCase();
        System.out.println("加密后的数据为:" + a);
        String b = URLDecoder.decode(decrypt(a, key), "utf-8");
        System.out.println("解密后的数据:" + b);
    }
}
